Cystopteris. Osmunda. 421 



Aspidium fragile Swartz. Synops. 58. SchJc. Crypt.b3. 

 t. 64 — 56. 



Polypodium fragile Linn. Spec. 1553. Flor. Dan. t. 401. 



Cyathea fragilis Act. Turin. 5. 417. Smith. Brit. 3. 

 1139. Roth. Germ. 3. 94. Engl. Bot. t. 1587. 



Athyrium fragiJe Slremp. Fil. 34. 



In fossis exsiccatis, viis cavis atque collinm 

 praeruptis. (Schdnhausen [Dr. Strempel].) Fruc- 

 tificat a Majo ad Octobrem nsque. 2j. 



Radix horizontalis, repens, squamosa, nigra. Stipites 

 teneri, primum nigri, mox e rnfo Intescentes, inferne 

 squamis piliformibus obsiti, 



II) OsMUNDACEAE Brown. Sporangia 1-locularia, ex- 

 annnlata, membranacea, reticulata, pellucida, vertice ra- 

 diatim vel dissimiliter striato ad unum (saepius exterius) 

 latus secundum longitudinem debiscentia. 



OsMUNDA Linn., Brown. 

 Todea Willd. 



Sporangia pedicellata, subglobosa, a basi ad gibbe- 

 rem dorsalem striatum dehiscentia, pinnas mntato-con- 

 tractas undique operientia vel in fronde immutata dorsa- 

 lia. Indusium nullum. Frondes bipinnatae. 

 1. Osmunda regalis Lim. Spec. 1521. Ftor. Dan. t.2i7. 

 Blackw. Herh. t. 324. Engl. Bot t. 209. 



Frondibus bipinnatis, apice contractis et fructiferis; 

 pinnulis fertilibus undique sporangiis opertis paniculam- 

 qne referentibus terminalem bipinnatam; sterilibus sub- 

 lanceolatis, obtusis, basi subauriculatis, margine integer- 

 rimis vel crenulatis, glabris. 



In locis humidis, ad paludum margines et in 

 nemoribns humentibus. (Grunewald, Charlot- 

 tenburg, Tegel, Papenberge.) Fructificat Jo- 

 nio, Julio. 2|. 



Radix crassa, folia magna copia agens. 



